Insulator.



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PATBNTED AUG. 25,1908, J. P. NIKONOW. Y

l INSULATOR. APPLICATION FILED 00T. zz, 1907.

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JOHN P.. NIKONOW, OF'EAST PITTSBURG, PENNSYLVANIA.

INSULATOR.

No. 896,934. p

Specification of Letters' Patent.

Patented Aug. 25, 1908.

Application led October 22, 1907. Serial No. 398,671.

To all whom 'it 'may concern:

Be it known 'that I, vJOHN P. NIKONOW, subject of the Czar of Russia, residing at East Pittsburg, in the county of vAllegheny and State of Pennsylvania, have invented certain new and useful Improvements in Insulators, of which the following is a specification.

The presentinvention is in the nature of an improved insulator for supporting electricl transmission wires and cables which are employed in connection with high tension currents, and one of the obj ects, of the invention is to design an insulator of this character which is adapted to withstand strong mechanical strain.

The invention further contemplates a peculiar arrangement of insulating material lso whereby surface leakage is reduced to a mlnimum.

For a full description of the invention and the merits thereof and also to acquire a knowledge of the details of construction and the means for effecting the result, reference is to be had to thefollowing description and accompanying drawings, in which:

Figure 1 is a longitudinal sectional view through an insulator embodying the inven-. tion. Fig. 2 is a similar view showing a modification, portions being broken away. Fig. 3 is a side elevation showing a further modification.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.

Referring to the embodiment of the invention shown in Fig. 1 the numeral 1 designates the core which may be formed of steel or similar material and has one end thereof threaded as indicated at 2 while the opposite end is provided with an enlargement- 3. This enlargement 3 has substantially a conical formation and may be either made integral With' the core' 1 or formed as a separate piece -and applied thereto as in the modiiication shownhin Fig. 2. Surrounding the enlargement 3 is a ring or collar 4 having the inner face thereof inclined on an angle corre#v spending to the outer face of the conical enlargement 3. interposed between the enlargement 3 and collar 4 is an inner insulating sleeve 6 and a second or outer insulating sleeve 7, the ends of theformer projecting considerably beyond the ends of the latter. For the purpose of reducing the weight of the insulator to a millimuin the collar 4 and enlargement 3 are given a comparatively shallowformation and thicknesses of sheet metal or lsimilar material are located between the insulating sleeves and the collar 4 and enlargement 3 asindicated at 8 and 9 respectively. These sheet metal sleeves 8 and 9 extend in both directions beyond the collar and enlargementl and have a comparatively large contact with the insulating'sleeves thereby increasing the effective clamping surface between the said collar and enlargement. This construction results in a still further advantage since the working surfaces of the collar` and enlargement bear against the sheet metal sleeves and no special machining of the same after being forged or cast is rendered necessary. l

A layer of insulating material 10 surrounds the core' 1 and extends within the insulatin sleeves 6 and 7 thereby increasing the lengt of the path which must be fol.- lowed by the surface leakage and reducing the same to a minimum. An insulating cap 11 is applied to the flared end of the insulating sleeve 6 and a ring 12 overlaps the adjacent edges of the said cap and the outer insulating sleeve 7. Interposed between this cap 11 and the enlargement 3 is ,a block 13 of Wood, porcelain or other suitable material, and layers 14 which are perferably of yielding material are located at oppositeends of the said block so as to evenly distribute the pressure due to any mechanical strain applied to the insulator. Y A metallic cover 15- receives the insulating cap 11 and the collar 4, a layer 16 of insulating material being interposed between the said cover and the capand a layer 17 of yielding materialbeing located between the. cover and the collar. Bolts 18 are shown as utilized for securing the cover to the collar, and the said bolts also en age the hanger 19 utilized for supporting t e insulator. It will also be observed that in the present instance locking washers 2D are employed infconnection with the bolts18 to prevent the latter from Working loose; The members 14 and 17 which are of yielding material may serve to evenly distribute .the internal stress produced when the members of the vinsulator are assembled andalso operate to hold the insulator sections in a close engagement with each other.

i-Thercore 1 is surrounded by an exterior sleeve 21 of porcelain or analogous materia1',`

thc said sleeve gradually tapering toward the outer end thereof and the space between the sleeve and the core beine fil-led by some `suitable form of cement. The flared end oi this external sleeve 21 is engaged by the cover 15 which projects slightly beyond the collar 4 while the opposite end is engaged byV a nut 22 and washer 2,3 upon the threaded endof the core. This threaded end 2 of the eore'also has a frame 24 appliedl thereto by'l valso to prevent excessive surface leakage in damp or rainy weather'. lt is also desired to again call attention to the fact that one end of the insulating sleeve 6 projects considerably beyond the enlargement 48 while the opposite end overlaps the insulating layer 10 surrounding the core and that an elongated path is thereby formed for the surface leakage between the metallic portion of the core and the metallic cover, the great resistance oi the said path reducing the surface leakage to an inappreciable extent.

In the modiiication shown in Fig. 2 the conical enlargement 3a is formed independent of the core laA and the latter extends through the enlargement and terminates within a chamber formed in the block 13, a nut 25 being threaded upon the said extremity of the core. In this form ci the invention there is but one insulating sleeve 6a employed and the said insulating sleeve bears directly against the enlargement 3a which may be ci insulating material, a sheet metal sleeve 8il being interposed between the insulating sleeve and the collar 4 a which is cast in position. The cover l5a is provided at its mouth with the depressions or grooves 26 lor receiving portions of the collar la and producing an interlocking connection therewith, the said collar being l'ormed ot Babbitt metal orsimilar material and poured in position when in a molten state. An insulating cap il is provided which receives the block lfr and overlaps the ilared end ol' the sleeve 6a. interposed between this insulating cap and the cover is sheet iietal 27 which receives the insulating cap and has the edges thereof soldered or otherwise permanently connected to the insulating sleeve 6, thereby sealing the interior of the insulator and shielding the same 'from the action of the atmosphere.

A further modiiication is shown in Fig. 3 in which the cover is omitted from the construction shown in Fig. 2 and the hanger 19h connected to the collar 1lb, the said hanger being formed so as to boar against the end of the insulator and hold the same in cm'perative relation to the collar.

Having thus described the invent iin. what is claimed as new is:

l. ln an insulator, the combinaiiou "ritira core provided with an enlargement, a collar seaesli surrdunding the enlargement, an insulating sleeve interposed between the collar and en largement and projecting beyond the latter in both directions, an insulating cap closing oneend of the insulating sleeve, and a block interposed between the insulating cap and the enlargement.

2. ln an insulator, 'the combination of a core provided with an enlargement, a collar surrounding the enlargement, an insulating sleeve interlgosed between the enlargement and the co ar and projecting beyond the former `in both directions, an insulating cap closing one end of the insulating sleeve, a

block interposed between the insulatin'v cap and the enlargement, and a layer of yielding material atene end of the block.

3. In an insulator, the combination of a core provided with an enlargement, a collar surrounding the enlargement, ani insulating sleeve interposed between the collar and enlargement and lprojecting beyond the latter in oth directions, an insulating cap at one end of the insulating sleeve, and a cover receiving the insulating cap and engaging `the collar.

4. In an insulator, the combination of a core, a collar surrounding the core, an insulating sleeve interposed between the collar and the core, an insulating cap at one end olt the insulating sleeve, and a'cover receiving the insulating cap and engaging the collar. 1 A

5. ln an insulator, the combination ol a core, an insulating sleeve receiving one end oi the core, an insulating cap at one end of the insulating sleeve, an insulating ring at the junction of the insulating cap and sleeve, and means exterior of the insulating sleeve for su porting the insulator.

6. lIii an insulator, the combination ol' a core provided with an enlargement, a collar surrounding the enlargement, an insulating sleeve clamped between the collar and enlargement, and a plate between one of the last mentioned members and the insulating sleeve for increasing the effective clamping surface.

7. ln an insulator, the combination of a core provided with an enlarged portion, a collar surrounding the enlarged portion, an insulating sleeve interposed between the eollar and enlarged portion, and plates between. the insulating sleeve and the enlarged portion of the core and the collar respectively for increasing the eii'ective-clamping surface of the latter members.

8. ln an insulator, the combination of'a core provided with an enlargement, a collar surrounding the enlargement,-an insulating sleeve interposed between the collar and en largement and projecting beyond the latter in both directions, a layer ol insulating material surrounding the core and extending rithin the insulating sleeve, and metallic sleeves -litting between the insulating sleeve and the 5 core provided m collar and enargement of the core respecterior sleeve surrounding the gore, and means tiveiy tov incre-ese the effective clamping surcopereting with the collar for holding the face of the latter members. lexterior sleeve in position.

9. Injan. ine eter, the combination oi" :i .In testimony whereof I effiziny signature d rh en enlargement, e, 1coller'v in presence of two Witnesses.

surroun in the enar ement, fan. insu atin T sleeve inteiosed betwgeen the collar-.and engi JOHN P- lWKONOVV. [L e] A largement and projecting roeyonei` the latter, Witnesses:

a, layer of insulation' surrounding the'eore and GEO. RANKIN, Jr., 10 extending Within the insulating sleeve,r an ex- MABEL C. JESSOP. 

